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' R. DINSMORE.

MAGAZINE FIREARM.

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Patented May 19, 1896.

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R. DINSMORB. -MAGAZINE FIRBARM.

No. 560,348. f Patented May 19; 1896.

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Lys/29161 UNITED o STATES PATENT EEIcE.

ROBERT DINSMORE, OF VESTON, NVEST VIRGINIA,VASSIGNOR OF ONE-HALF TOMORIS GREENSTEIN, OF SAME PLACE.

MAGAZINE-FIREARM..

SPECIFICATION forming part of Letters Patent No. 560,348, dated May 19,1896.

y Application led April 8, 1895. Serial No. 544,990. (No model.)

T all whom it may concern.'

Be it known that I, ROBERT DiNsMoRE, a citizen of the United States,residing at lVeston, in the county of Lewis and State of lVest Virginia,have invented a new and useful Firearm, of which the following isaspecilication.

This invention relates to an improvement in firearms of that class knownas repeatro ing.

The object of the present invention is to simplify and improve theconstruction shown and described in a former patent granted to me March7, 1893, No. 492,864, for improvement in magazine-guns- The primaryobject of this invention is to provide a novel form of trigger and lockoperating in connection therewith, whereby a brace is formed between thetrigger and the locking-bolt for effectually preventing saidlocking-bolt from being thrown down by the concussion caused by theexplosion of the cartridges.

A further and very important ob j ect of this invention is to providethe locking-bolt at its forward end with a depending lug which isadapted to operate against a fixed stop or roller secured within theframe of the gun for the purpose of starting a cartridge-shell from theliring-chamber preparatory to the ejection of the shell from the gun.

A further object of the invention is to provide atrigger of novelconstruction, comprising two sections which are pivotally connected witheach other and arranged and combined with the other operative parts insuch manner that the trigger is adapted for a repeating or set trigger.

Another ob ject of this invention is to provide a novel form ofcartridge-stop and means for automatically actuating the same,wherebysaid cartridge-stop is adapted to operate upon the adjacent cartridge atthe mouth of the magazine for forcing said cartridge slightly forwardout of the path of the cartridge-carrier, thereby preventing thecartridge from bearing against said carrier, and leaving the latterperfectly free to travel up anddown within the frame of the gun.

5o A further object is to construct the cartridge-stop in such mannerthat when thrown forward into engagement with a cartridge said stop willbe effectually locked in place and prevented from being thrown down oraccidentally removed from behind the cartridge until withdrawn bysuitable devices for that purpose.

A further object of the invention is to provide a simple magazine, whichis pivoted at its forward endbeneath the barrel of the gun,` andprovided at its rear end with means whereby said end is adapted to belocked with relation to the frame of the gun either in position toreceive a supply of cartridges or in normal position, in which thecartridges are adapted to be fed to the carrier, or in an intermediateposition, in which the cartridges will be prevented from escaping fromthe magazine and entering the carrier or getting into the main body orframe of the gun, under which adjustment the gun may be exhibited andthe operation thereof demonstrated with perfect safety.

In order to accomplish the objects above enumerated, the inventionconsists in certain novel features and details of construction andarrangement of parts, as hereinafter fully described, illustrated in thedrawings, and pointed out in the claims.

In the accompanying drawings, Figure l is a vertical longitudinalsection taken through the frame of the gun, showing the breech-bolt andthe mechanism in one lateral half of the gun, showing also the adjacentend of the magazine, together with the means for adjusting and lockingthemagazine in its several positions, the parts being in the position inwhich the bolt is drawn back just ready to feed a cartridge into thefiring-chamber and with the cartridge-stop thrown up into engagementwith a cartridge at the mouth of the magazine. Fig. 2 is a similar View,but with the breech-bolt and a portion of the firing-pin in longitudinalsection and with the parts in the other extreme. Fig. 3 is a viewsimilar to Fig. l, but with the breech-bolt omitted and showing themechanism in the other lateral half of the gun. Fig. Li is a similarview with the magazine omitted, showing the cartridge-stop thrown downout of the way of the mouth of themagazine, and showing also in dottedlines the positions the trig- IOO ger and sear occupy just after thefiring-pin is released. Fig. 5 is a side elevation of the gun, partlybroken out and in section, illustrating the manner in which the magazineis pivoted beneath the barrel, said magazine being shown partly insection. Fig. 6 is a vertical transverse section on the line x a: ofFig. 2. Fig. 7 isa detail perspective view of the verticall y-reciprocatin g cartridge-carrier. Fig. S is a similar View showing the formof the sear, the actuating-catch jointed thereto, andthe switch-lever.Fig. 9 is a side elevation of the gun with a portion of the adjacent 4side plate or frame of the gun broken away and removed to show theinternal mechanism. Fig. 10 is a horizontal longitudinal section takenon the line y y of Fig. 2.

Simi-lar numerals of reference designate corresponding parts in the-several figures of the drawings.

Referring to the drawings, the frame of the gun is made in halves in theusual manner, being held together by screws at convenient points. Thetwo halves of the frame of the gun are provided at or near the top withlongitudinally-extending grooves or pockets, which are approximatelysemicircul-ar, providin g for the reeeptionof a reciprocating bolt(indicated at 1) which is adapted to move back and forth in direct linewith the barrel of the gun. The bolt 1 is formed with a cylindrical boreor chamber 2, which is reduced in diameter at the forward end of saidbolt to form a shoulder 3 for limiting the forward thrust of thefiring-pin. Said bolt is also reduced in external diameter at suchforward end to form a seat upon which is secured a springcatch 4, saidcatch being provided at its forward end with a depending lip 5, which isadapted to spring over and engage the flange of the cartridge-shell, asindicated .in Fig. 2, and by means of which the shells vare adapted tobe withdrawn from the firing-chamber. The front end of the bolt isclosed, with the exception of a small central perforation 6, throughwhich the point of the firing-pin passes in the act of exploding acartridge. The firing-pin (indicated at 7) is cylindrical in form and isrecessed cr provided with a socket 8 in its rear end for the receptionof an actuating-spring 9, the 'forward end of which bears against theinner portion of a laterallyprojecting finger 10 of the firing-pin 7 andthe rear end of which is supported against a pin or stop 1l, locatedwithin and carried by the reciprocatingbolt 1. The firing-pin 7 isshouldered, as indicated at 12, and sai-d shoulder is adapted in theforward thrust of said firingpin to strike against the internal shoulder3 of said pin. The firing-pin is extended forwardly beyond said shouldersufficiently to enable the point 13 thereof to pass through theperforation G in the front end of the bolt suiiiciently to explode acartridge located in the firing-chamber. The firing-pin is cut away atits underside to-form a shoulder 14, which is adapted to be acted uponby an upwardlyextending lug on the forward end of the locking-block, thepurpose of which, as will hereinafter appear, is to withdraw the pointof thc pin from engagement with the cartridge after the latter has beenwithdrawn from the firingehamber and preparatory to its ejection fromthe gun. The firing-pin 7 projects through a longitudinal slot 1i in theside wall of the bolt and is adapted to travel in a groove l5 in theadjacent side wall of the frame of the gun. The opposite inner wall ofthe frame is grooved in asimilar manner, and within theselongitudinallyextending oppositelydisposed grooves the pin 11, whichpasses horizontally through the rear end of the bolt, is adapted toreciprocate for the purpose of supporting and guiding the bolt in itsmovements back and forth. As above stated, the pin 11 also serves tosupport the rear end of the actuating-spring of the firing-pin.

1G designates a locking-block, which is pivoted at its forward en dbetween a pair of lu gs 162 pendent from the lower face or side of thereciprocating bolt, said locking-block being provided at its front endwith an upwardlyprojecting lug 17, extending through au aperture or slot1S in the lower wall of the bolt and adjacent to or slightly removedfrom the internal shoulder 3 of the bolt, above dcscribed, saidupwardly-projecting lug being adapted to operate against the shoulder 1iof the iiring-pin for withdrawing the point of said pin from itsengagement with the cartridge-shell. At the rear end the lockingblock 1Gis provided with an upward extension 19, which is adapted to lie behindthc bolt when a cartridge is exploded. In rear of the extension 19 thelocking-block is extended backwardly to forma support 20, thc rear endof which is adapted to rest against the rear vertical wall 21 of theframe of the gun for the purpose of enabling the bolt and thelocking-block to withstand the recoil caused by the explosion of acartridge. The lockingblock is further provided on its under face withapair of pendent lugs 22, between which is pivoted one end of a link 23,the opposite end of which is pivotally connected with the upper end ofthe trigger, as shown at 2i. The locking-block 16 is provided at or nearits rear end with a recess 25 for the reception of the upper end of alocking-brace 2U, between which and the locking-block and within saidrecess 25 is located a spiral spring 27, one end of which is secured tothe lockingblock and the other end connected with the locking-brace, thearrangement being such that said locking-brace is normally held forwardin engagement with the rear section of the trigger, as shown in Fig. 2.

2S represents a link which is pivotally connected with the frame of thegun at the rear end thereof, the opposite or free end of said link beingpivotally connected with the locking-block at the same point as thepivoted locking-brace. This link 2S serves to regu- IOO IlO

late the movements of the rear end of the locking-block and to directthe rear end of said locking-block into its proper position behind thereciprocating bolt for supportingthe latter against recoil.

The trigger is made in two sections, the forward section 29 of which ispivoted to the lower end of the link 23 and journaled on a fixed stud orpivot 30, secured to the frame of the gun and extending across the loweraperture 3l of the frame of the gun, through which the trigger operates.The rear or lower section of the trigger, which carries the finger-gripand is designated at 32, is con-l nected with the other sectionv of thetrigger by means of a knuckle-joint, as shown at 33, the section 32 ofthe trigger being provided with an upwardly-extending arm 34, which isadapted to abut against the upper forward section 29 of the trigger, andis notched at the upper extremity of said arm to receive and engage thepointedlower end of the locking-brace 26, as shown in Fig. 2, when thereciprocating bolt is thrown forward. The lower or rear section 32 ofthe trigger is normally held away from the opposing section bymeans of aspiral spring 35, interposed between the upper portions of thetrigger-sections or above the joint of said sections, the opposite endsof said spring resting in recesses or pockets in the inner adjacentfaces of said triggersections. The forward movement of theupwardly-extending arm 34 of the rear section of the trigger is limitedby the section 29, and the reverse movement of the section 32 is limitedby means of a stop 36 thereon coming in contact with a shoulder 37 onthe section`29.

3S designates the restoring-spring, which is mounted at one end in arecess in the frame of the gun in any usual or preferred manner and isconnected at its free end with the upper forward section of the triggerby means of an interposed link 39, pivoted at one end to the trigger andat its opposite end to said spring. The point upon the trigger at whichsaid link is pivoted is located in such position that after said triggerhas been vibrated to a certain point the spring will act by its tensionto assist said trigger in its forward movement and also to retain theupper forward section of the trigger in its advanced position. In thebackward movement of the reciprocating bolt the spring 3S acts withconsiderable force upon the trigger and serves,through deviceshereinafter described, to accelerate the withdrawal of the bolt and theupward movement of the cartridge-carrier and the ejection of the shells.rlhe breech-bolt is reciprocated for opening and closing the breech bymeans of the locking recoil-block, which is pivotally connected thereto,as described, and is itself actuated by the forward trigger-section 29and the link 23, pivotally connected at one end to said trigger-sectionand at its opposite end to the locking-block. Thus as the trigger ispulled the breech-bolt is thrust forward, as shown in Fig. 2, and uponthe reverse movement of the trigger, assisted by the restoring-spring38, the breech-bolt is drawn back, as shown in Fig. l, to allow acartridge to be raised into the plane of the barrel.

The frame of the gun, at or near its forward end, is formed with avertically-extending well 40, arranged just in rear of the mouth of themagazine and between the firing-chamber and the longitudinally-extendingrecess in which the bolt reciprocates. This well is formed by providingthe opposite inner walls of the gun-frame with inwardlyprojectingvertically-extending shoulders 4l at the front of the well and a wall41a at the rear, and within said well a vertically-reciprocatingcartridge-carrier 42 is mount-ed. The carrier is of the ordinaryconstruction, comprising a longitudinal bore 43, above which the sidewalls 44 are extended and contracted, as indicated at 45, the carrierbeing provided in or near its base with an elongated slot 46. YThe slot46 is adapted to receive and be engaged lby the inwardly-projecting endof an operating-lever 47, which is pivoted at or near its opposite endto the inner wall of the gun, about centrally thereof, by means of ascrew 48. The operating-.lever 47 is held either in its upward or itsdownward position by means of a serpent-spring 49, secured at one end tothe casing and at its opposite end to the operating-lever 47 in rear ofits pivot. The operating-lever 47 is provided at a point located aboveits pivot and slightly in rear thereof with an inwardly-projecting spuror lug 50, which in the backward movement of the bolt is acted upon by adownwardly-pro- IOO jecting hook or lug -51 on the front end of thelocking-block 16 for vibrating said lever and causin git to elevate thecartridge-carrier. In the forward movement of the bolt the spur or lug50 of the lever 47 is operated upon by a downwardly-projecting lug 52 onthe forward upper end of the pivoted link 23, hinged to thelocking-block, as indicated in Fig. 2, for the purpose of lowering thecartridge-carrier into the position indicated in said figure.

53 designates the sear, which is pivoted to the frame of the gun uponthe inner wall thereof, as indicated at 54, the upper end of said searbeing adapted to project upwardly within the path of thelaterally-projecting finger 10 of the firing-pin, where it is providedwith an inclined shoulder 55 for enabling said iinger to pass by saidsear in its backward movement said sear also havin 0 a vertical shoulder56, which is adapted to engage the finger 10 of the firing-pin, asindicated in Figs. 3 and 4, for holding back said pin while the bolt isbeing advanced to push a cartridge into the liring-chamber. The sear isoperated for releasing the iiring-pin and iiring a cartridge by means ofa catch 57, which is connected by a universal joint to the lower end ofthe sear and extends backwardly, where it rests between a pair of par-IIO allel ears or lugs 58, carried by a short crankarm 59, mounted uponthe inner end of a short pin or shaft GO, which extends through the wallof the gun and has secured rigidly to its outer end aswitch-lever 6l,said switchlever being provided at its swinging end with aninwardly-proj ectin g pin 62, which is adapted to engage one or theother of a pair of indentations 63. By adjusting the switch-lever to theupper position, as shown in Fig. 5, the trigger is adapted to act as anordinary trigger, whereas by adjusting said switch-lever to the lowerposition (indicated in dotted lines in the same figure) the parts arethrown into a relation which will adapt the trigger to act as arepeater. G4 indicates a leaf- -spring located beneath the catch 57 andadapted to force the catch-lip G5 thereof into engagement with thetrigger. Then the catch 57 is adj usted to its lower position, uponoperating the trigger the forward section of the latter, by reason of agroove therein, passes by the catch-lip 05 until the shoulder UG of adepression in the rear or lower section of the trigger comes intocontact with said catch, when the latter is thrust forward,

thereby rocking the scar upon its pivot and withdrawing the verticalshoulder thereof from its engagement with the firing-pin, thus releasingthe latter and exploding a cartridge. Vhen the catch 57 is adjustedtoits upper position, as indicated in Figs. 3 and 4, upon operaf-in gthe trigger the catch will be deflected laterally by the forward sectionof the trigger and will rest upon the upper end 67 of the rear sectionof the trigger until said rear section is released and acted upon by thespring 35, when the catch-lip 65 will drop in between the twotrigger-sections, and when the trigger is again operated the rearsection thereof will engage the catch 57 and force the same forward forwithdrawing the sear from its engagement with the firing-pin. The latterarrangement is where the trigger is used as an ordinary trigger.

Under either of the adjustments last above described it will be observedthat as the trigger is operated and the reciprocating bolt thrustforward the rear section of the trigger, or, more accurately speaking,the upwardly-extending arm of said section and the downwardly-extendin gspring-actuated lockin g-brace, will by their peculiar arrangement andthe relative location of their pivots and their common point of contactbeyond the dead-center or engagement form an arch or throw their pointof contact in advance of a line drawn through their pivots, thus forminga thorough and effective brace for upholding the rear end of thelocking-block and rendering it impossible to throw said lockingblockdownward by the concussion from an exploding cartridge.

US'designates the cartridge-stop, which consists of aforwardly-extending arm located in'the base of the frame of the gun andprovided wit-h an enlarged rear end having an vented.

. edge or face of the lever 72.

thrust forward the vertical edge S4 of its lug4 inclined slot G9 andalso a longitudinally-extending slot 70, a fixed securing-screw 7l beingpassed through the slot 7 O and also through the lower end of anactuating-lever 72, and thence into the frame of the gun. Theactuating-lever 72 is provided with a pin 7 3,which engages the inclinedslot 60 in the cartridgestop for the purpose of moving said stop in aforward and backward direction, the object being to thrust the adjacentcartridge at the mouth of the magazine slightly within the magazine andout of the path of the vertically-moving cartridge-carrier, thereby re-`lieving said carrier from the pressure of the cartridges and enablingthe same to move freely up and down within the well. As thecartridge-stop is drawn backward by the operation of the lever 72 thepin 7 3 on said lever operates against the base of said inclined slot69,and thereby-serves to depress the cartridgestop against the action ofa flat spring 7 i or into the position indicated in Fig. 4. The upwardmovement of the cartridge-stop is lim- 'ited by means of a pin or stop75, projecting inwardly from the frame. The cartridge-stop 'GS isfurther provided with an elbow 7G,

which, when said cartrid ge-stop is thrown forward into the positionindicated in Fig. 3, rests jupon a shoulder 77, formed by notching or-slotting the safety-lug 7 8, as best illustrated 4in Fig. et. By meansof this construction, Iwhen the cartridge-stop is thrown upward andforward, as described, the cartridge at the mouth of the magazine willbe forced out of the path of the carrier, and by reason of the elbow 7Gresting upon the shoulder 77 the accidental displacement or throwingdown of the cartridge -stop will be eifectually pre- The upper end ofthe lever for actuating the cartridge-stop is formed with a verticalshoulder 79 and with an inclined shoul- Ader 80 and also with a roundededge or portion 81, adapting said actuating-lever to be `operated uponby one of the pendent lugs projecting from the bottom of thereciprocating bolt. The inclined edge S2 of said lug operates againstthev inclined edge or portion and while the cartridge-stop is acting tohold the cartridge, as above explained, the lower edge S3 of said lugrides upon the rounded As the bolt l is operates against the verticaledge or lip 7 9 of the lever 72, thereby withdrawing and depressing thecartridge-stop and permitting a for the purpose of starting the shellfrom the IOO IIO

firing-chamber by drawing slightly upon the reciprocating bolt in abackward direction, said bolt being engaged with the shell by means ofthe spring-catch 4f, above described. The flange of the shell beingengaged between the said spring-catch 4 at the top and a lip orprojection on the bolt at the bottom, when the shell is withdrawn fromthe firing-chamber and the point of the firing-pin withdrawn fromengagement with said shell the latter is held in such position withrelation to the bolt that it is adapted to be acted upon by the upwardmovement of the carrier for the purpose of-ejecting the same from thegun.

rlhe magazine V(indicated at 86) is of the usual tubular form and ispivoted at its front end in any convenient manner beneath the barrel ofthe gun, as indicated at 87. The rear end of the magazine is thus leftfree and is adapted to be engaged with the frame'of the gun and adjustedto either one of several positions. The rear end of the magazine movesvertically within a recess or socket between the halves of the frame ofthe gun and is provided with a longitudinally-movable bolt 8S, mountedin a socket therein and adapted to engage one of several perforations orsockets S9 in the adjacent end of the gun-frame. The bolt S8 is actuatedby means of a spring 89a, but may be operated against the tension ofsaid spring by means of a thumb-slide 90, working in a longitudinalrecess 9l at the under side of the magazine. Vhen the bolt 88 is engagedwith the upper one of the perforations S9, the magazine is in positionfor delivering the cartridges to the carrier. 'When the bolt 88 is inengagement with the lower perforation 89, the magazine is in suchposition that the cartridges rest against the safetylug 7 8, under whichadjustment the gun may be handled and exhibited and the operationthereof demonstrated with perfect safety. In order to charge themagazine, the latter is moved into the position shown in Fig. 5, inwhich position it is supported by means of the pin 92, attached to therear end of the magazine and projecting therefrom into avertically-extending slot 93 in the adjacent end of the frame of thegun,where it rests upon a suitable supporting-spring 94, as shown. Thebase of the frame of the gun is hollowed out, as indicated at 95, forpermitting the cartridges to be inserted one by one into the mouth ofthe magazine, the pin 92 and spring 9i operating as each cartridge isinserted to elevate the rear end of the magazine sufficiently for thelast cartridge inserted to be engaged by the adjacent lower edge of thegun and prevented thereby from escaping. In this way the magazine isfilled, after which it may be moved to its normal position. (lndicatedin Figs. l, 2, and 3.)

By the construction above described the gun is adapted to be used eitherwith an ordinary trigger or as a repeater. rlhe meehanism is perfectlyreliable and positive in action, thus making the gun especially valuablefor very rapid firing. By reason of the novel and superior mannerV inwhich the reciprocating bolt is locked and braced the gun is peculiarlyadapted to the use of dynamite cartridges.

It will be apparent that various changes in the form, proportion, andminor details of construction may be resorted to without departing fromthe spirit or sacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is-- l. In a firearm, a triggercomprising two sections connect-ed by a knuckle-j oint and fulcrumed ona common pivot, said sections each having a rigid arm or extensionworking within the frame of the gun and provided with suitable stops andshoulders which render one section capable of movement relatively to theother section and at the same time capable of operating said othersection, one of said sections being connected with and adapted tooperate the locking-block, and the remaining section being adapted toactuate the firing mechanism, for the purpose and substantially asdescribed.

2. In a firearm, a trigger comprising two separate sections connected bya knucklejoint and fulcrumed on a common pivot within the frame of thegun so as to be capable of independent movement, suitable stops andshoulders upon each of said sections adapted to cooperate for enablingone section to control the other section, and a spring interposedbetween said sections for holding the same apart upon one side of theirpivotal connection, said spring being seated in pockets in the adjacentfaces of said sections, one of said sections being connected with andadapted to operate the locking-block, and the remaining section beingadapted to actuate the firing mechanism, substantially as and for thepurpose described.

3. In a firearm, the combination with the sear and its catch, of atrigger comprising two independently movable sections having a commonpivotal connection and provided with suitable stops, by means of whichone of said sections may be controlled and operated by the othersection, arms extending upwardly from said trigger-sections and providedwith depressions or recesses at one side adapted to receive the catch onthe scar, and a shoulder on the rear trigger-section for engaging thecatch of the sear for the purpose of withdrawing said sear from itsengagement with the plunger-pin, substantially as described.

4. In a firearm, the combination with the sear and its catch, of atrigger comprising two independently movable sections having a commonpivotal connection with each other and with the frame of the gun andprovided with stops which cooperate to enable one of said sections tocontrol and operate the other section, an upwardly-extending arm on theforward trigger-section having a rounded face IOO for adapting the catchon the sear to ride over said arm, and a corresponding arm on the reartrigger-section having a shoulder for engaging the catch of the sear,substantially in the manner and for the purpose described.

5. In a firearm, a trigger comprising two sections having a commonpivotal connection and independently movable and also provided withupwardly-extending arms, in combination with the recoil locking-block, alink interposed between one of said trigger-sections and thelocking-block, and a locking-brace interposed between the othertrigger-section and said locking-block, in such manner as to form anarch to prevent the locking-block from being thrown down by the recoil,substantially as specified.

(5. In a firearm, a trigger made in two sections having a common pivotalconnection with each other and with the frame of the gun and capable ofmovement independently of each other, inwardly-projecting arms on saidtrigger-section, and a spring interposed between said arms for holdingthe same normally apart, in combination with the recoil locking-block, alink interposed between one of the trigger-arms and the locking-block, alocking-brace interposed between said locking-block and the arm of therear trigger-section, and means for holding said locking-brace normallyin engagement with said arm, for the purpose of forming an arch to guardagainst the depression of the locking-block, substantially as specified.

7. In a firearm, a trigger comprising two independently-movable sectionshaving a common pivotal connection with each other and with the frame ofthe gun and provided with inwardly-extending arms, stops for limitingthe movements of the trigger-sections relatively to each other, and aspring for holding the inwardly-projecting arms thereof normall y apart,in combination with the lockingblock, alink interposed between one ofthe trigger-sections and the locking-block, and a spring-actuatedlocking-brace interposed between said locking-block and the othertrigger-section, the pivots of the trigger and the locking-brace and thepoint of engagement between said trigger and locking-brace beingarranged in a manner adapting said parts to form an arch beneath thelocking-block whereby the latter will be prevented from being throwndown by concussion, substantially as described.

8. In a firearm, a trigger comprising two sections independently movableand having a common pivotal connection, in combination with thelocking-block, a link interposed between the forward trigger-section andsaid locking-block, a restoring-spring, a pivoted link interposedbetween said spring and the forward trigger-section, the pivots of saidtrigger-section and at each end of the link being arranged in suchrelation that when the forward trigger-section passes beyond a certainpoint in its forward movement said spring will serve to assist the samein suoli movement, for the purpose specified.

' 9. In a firearm, the Combination with the reciprocating bolt providedwith an intern allyarranged shoulder, of a shouldered plunger mountedwithin said bolt and movable longitudinally and also provided with arecess in its rear end, the plunger-pin passing through the base of saidrecess and also operating through a longitudinal slot in the bolt, incombination with an actuating-spring interposed between said plunger-pinand a pin or stop secured'in the rear end of the bolt, substantially asdescribed.

IO. In a firearm, a longitudinally-reciproeating bolt reduced indiameter at its front end to form an internal shoulder and provided witha guiding-pin at its rear end working in oppositely-disposed grooves inthe frame of the gun, in combination with a firing -pin mounted toreciprocate within said bolt and provided with a socket or recess in itsrear end, an actuating-spring arranged within said socket or recess andsupported at its rear end by the guiding-pin of the reciprocating bolt,and the plunger-pin operating through a slot in said bolt, substantiallyas specified.

ll. In a firearm, a reciprocating bolt provided with an aperture in thebottom wall thereof, and a spring actuated firing pin. mounted toreciprocate therein and provided with a shoulder on its under side, incombination with the locking-block pivotally connected with saidreciprocating bolt and provided with a lug extending through theaperture .in the bottom of said reciprocatingbolt, said lug bein gadapted to engage the shoulder of the firing-pin for the purpose ofwithdrawing the point of the latter out of engagement with acartridge-shell preparatory to the ejection of said shell from the gun adepending lug on the locking-block and a fixed pin on the gun-frame forassisting in the withdrawal of the firing-pin, substantially asdescribed.

12. In a firearm, a reciprocating bolt provided with means for engagingthe flange of a cartridge-shell and having also the usualspring-actuated plunger or firing-pin, and provided with an aperture oropening in its under side, in combination with the lockingblockpivotally connected with said bolt and provided with adownwardly-extending lug or projection, and a fixed stop or roller inconnection with which said lug or projection on the locking-block isadapted to operate for thc purpose of starting a cartridge-shell fromthe firing-chamber, substantially as described.

13. In a firearm, the combination with the trigger and with thefiring-pin, of the scar, a catch jointed thereto and arranged in thepath of the trigger, a c rank-arm for adjusting the position of saidcatch, and a switchlever arranged upon the exterior of the frame of thegun for operating said crank-arm, substantially as described.

lt. In a firearm, the combination with the trigger and firing-pin, ofthe sear, a Acatch IOO jointed thereto, a crank-arm having a bifurcatedor forked end between which said catch rides, a transverse shaft uponwhich said arm is mounted extending through the side wall of thegun-frame, anda switch-lever mounted upon said shaft and located uponthe exterior of the gun-frame, substantially as specified.

l5. In a firearm, the combination with the trigger and firing-pin, ofthe sear, a catch jointed thereto, a crank-arm connected with said catchfor operating the same, a spring for throwing said catch into engagementwith for operating said cartridge-stop, and a lug on the reciprocatingbolt for operating said actuating-lever, substantially in the mannerdescribed.

17. In a firearm, a cartridge-stop provided at its front end with anupwardly-extending finger for engaging the adjacent cartridge in themagazine and with an elbow adapted to rest upon a horizontal shoulder inthe safetylug, in combination with an actuating-lever provided with apin operating in a slot in said cartridge-stop, whereby the latter isthrown upward at its forward end into engagement with the cartridge andthe horizontal shoulder and securely locked against displacement untilwithdrawn by its actuating-lever, substantially as described.

1S. In a iirearm, a cartridge-stop having an upward and a longitudinalmovement adapting it to engage a cartridge at the mouth of the magazineand to force the same inward out of the path of the carrier, saidcartridgestop having its rear end enlarged and slotted, a stationary pinpassing through one of the slots in the cartridge-stop and intothe frameof the gun, and an actuating-lever provided with a pin operating in aninclined slot in the cartridge-stop for imparting the movement abovedescribed thereto, all arranged and adapted to operate as specified.

19. In a firearm, a cartridge-stop capable of both vertical andlongitudinal movement and adapted to be moved into engagement with acartridge in the magazine for the purpose of removing said cartridge outof the path of the cartridge-carrier, in combination with anactuating-lever connected with said cartridge stop and provided withoppositely-disposed shoulders adapted to be operated upon by a 'deredand adapted to vibrate the cartridgestop-actuating lever in itsmovements back and forth, substantially as described.

20. A cartridge-stop capable of both vertical and longitudinal movementand adapted to remove a cartridge from the mouth of t-he magazine forthe purpose of carrying the same out of the path in which thecartridge-carrier travels, in combination with an actuating-lever forsaid cartridge-stop, said actuating-le ver being provided with shouldersagainst which a correspondinglylshouldered lug on the reciprocating boltis adapted to operate and also provided with an additional shoulder orrounded portion upon which said lug is adapted to ride in itsreciprocating movement for the purpose of holding the cartridge-stop inengagement with the cartridge at the mouth of the magazine, and a springlocated beneath the cartridge-stop and bearing thereunder for thepurpose of assisting the upward movement of said cartridge-stop,substantially as described.

21. In a firearm, a magazine pivoted at its forward end beneath thebarrel and adapted to swing downward and be charged at the rear swingingend thereof, in combination with a sliding catch or bolt for engagingthe rear swinging end of the magazine with the frame of the iirearm, anda spring arranged within a vertical recess in the gun-frame forsupporting the rear end of the magazine with relation to the frame ofthe firearm while said magazine is being charged with cartridges, saidspring serving to support the mouth of the magazine partially over or inline with the forward lower corner or edge of the frame and adapting thelatter to serve as a stop for preventing the escape of the cartridges asthey are inserted into the mouth of the magazine,

substantially as described.

22. In a firearm, a magazine pivoted at its forward end to the barreland adapted to be charged at its rear swinging end, meansV forsupporting the rear swinging end of the magazine with relation to theframe of the firearm, a sliding catch or bolt carried by said magazine,and two lor more sockets in said frame adapted to receive said catch orbolt,whereby the magazine may be adjusted into any one of severalpositions, substantially as and for the purpose specified.

In testimony that I claim the foregoing as my own I have hereto afxed mysignature in the presence of two witnesses.

ROBERT DINSMOR'E. \Vitn esses:

JOHN H. SiGGERs, HAROLD H. SIMMs.

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